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Shri Krishna Joshi
Prof. Shri Krishna Joshi (6 June 1935 – 15 May 2020) was an Indian physicist. He was born on 6 June 1935 in the village of Anarpa in Kumaun, Uttarakhand, India. Career Joshi received his Ph.D. in physics from Allahabad University in 1962. Joshi's broad areas of interest are condensed matter and collision processes. His early research was in the study of phonons in metals and insulators. Later, he studied electronic states in disordered systems and electron correlation in narrow band solids. He has also worked on Surface states and Segregation in materials. Joshi conducted studies on excitation and ionization processes in atoms, ions, and molecules. His research interests lie in strongly correlated electron systems, such as high temperature superconductors, and also in nanotechnology, especially electron transport in quantum dots and nanotubes. Joshi supervised the Ph.D. theses of twenty scholars and has published more than 190 research papers. He was Professor of Physics at ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Almora, Uttarakhand
Almora ( Kumaoni: ''Almāḍ'') is a municipal board and a cantonment town in the state of Uttarakhand, India. It is the administrative headquarters of Almora district. Almora is located on a ridge at the southern edge of the Kumaon Hills of the Himalaya range. Koshi (Kaushiki) and Suyal (Salmale) rivers flow along the city and snow-capped Himalayas can be seen in the background. Almora was founded in 1568 by King Kalyan Chand; however, there are accounts of human settlements in the hills and surrounding region in the Hindu epic Mahabharata (8th and 9th century BCE). Almora was the seat of Chand kings that ruled over the Kumaon Kingdom. It is considered the cultural heart of the Kumaon region of Uttarakhand. According to the provisional results of the 2019 national census of India Almora had a population of 179,000. Nestled within higher peaks of the Himalaya, Almora enjoys a year-round mild temperate climate. The town is visited by thousands of tourists annually from all ove ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electron Correlation
Electronic correlation is the interaction between electrons in the electronic structure of a quantum system. The correlation energy is a measure of how much the movement of one electron is influenced by the presence of all other electrons. Atomic and molecular systems Within the Hartree–Fock method of quantum chemistry, the antisymmetric wave function is approximated by a single Slater determinant. Exact wave functions, however, cannot generally be expressed as single determinants. The single-determinant approximation does not take into account Coulomb correlation, leading to a total electronic energy different from the exact solution of the non-relativistic Schrödinger equation within the Born–Oppenheimer approximation. Therefore, the Hartree–Fock limit is always above this exact energy. The difference is called the ''correlation energy'', a term coined by Löwdin. The concept of the correlation energy was studied earlier by Wigner. A certain amount of electron co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shanti Swarup Bhatnagar Prize
The Shanti Swarup Bhatnagar Prize for Science and Technology (SSB) is a science award in India given annually by the Council of Scientific and Industrial Research (CSIR) for notable and outstanding research, applied or fundamental, in biology, chemistry, environmental science, engineering, mathematics, medicine, and physics. The prize recognizes outstanding Indian work (according to the view of CSIR awarding committee) in science and technology. It is the most coveted award in multidisciplinary science in India. The award is named after the founder Director of the Council of Scientific & Industrial Research, Shanti Swarup Bhatnagar. It was first awarded in 1958. Any citizen of India engaged in research in any field of science and technology up to the age of 45 years is eligible for the prize. The prize is awarded on the basis of contributions made through work done in India only during the five years preceding the year of the prize. The prize comprises a citation, a plaque, a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Hindu
''The Hindu'' is an Indian English-language daily newspaper owned by The Hindu Group, headquartered in Chennai, Tamil Nadu. It began as a weekly in 1878 and became a daily in 1889. It is one of the Indian newspapers of record and the second most circulated English-language newspaper in India, after ''The Times of India''. , ''The Hindu'' is published from 21 locations across 11 states of India. ''The Hindu'' has been a family-owned newspaper since 1905, when it was purchased by S. Kasturi Ranga Iyengar from the original founders. It is now jointly owned by Iyengar's descendants, referred to as the "Kasturi family", who serve as the directors of the holding company. The current chairperson of the group is Malini Parthasarathy, a great-granddaughter of Iyengar. Except for a period of about two years, when S. Varadarajan held the editorship of the newspaper, the editorial positions of the paper were always held by members of the family or held under their direction. His ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Padma Bhushan
The Padma Bhushan is the third-highest civilian award in the Republic of India, preceded by the Bharat Ratna and the Padma Vibhushan and followed by the Padma Shri. Instituted on 2 January 1954, the award is given for "distinguished service of a high order...without distinction of race, occupation, position or sex." The award criteria include "service in any field including service rendered by Government servants" including doctors and scientists, but exclude those working with the public sector undertakings. , the award has been bestowed on 1270 individuals, including twenty-four posthumous and ninety-seven non-citizen recipients. The Padma Awards Committee is constituted every year by the Prime Minister of India and the recommendations for the award are submitted between 1 May and 15 September. The recommendations are received from all the state and the union territory governments, as well as from Ministries of the Government of India, Bharat Ratna and Padma Vibhushan aw ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Padma Shri
Padma Shri ( IAST: ''padma śrī''), also spelled Padma Shree, is the fourth-highest civilian award of the Republic of India, after the Bharat Ratna, the Padma Vibhushan and the Padma Bhushan. Instituted on 2 January 1954, the award is conferred in recognition of "distinguished contribution in various spheres of activity including the arts, education, industry, literature, science, acting, medicine, social service and public affairs". It is awarded by the Government of India every year on India's Republic Day. History Padma Awards were instituted in 1954 to be awarded to citizens of India in recognition of their distinguished contribution in various spheres of activity including the arts, education, industry, literature, science, acting, medicine, social service and public affairs. It has also been awarded to some distinguished individuals who were not citizens of India but did contribute in various ways to India. The selection criteria have been criticised in some ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
New Delhi
New Delhi (, , ''Naī Dillī'') is the capital of India and a part of the National Capital Territory of Delhi (NCT). New Delhi is the seat of all three branches of the government of India, hosting the Rashtrapati Bhavan, Parliament House, and the Supreme Court of India. New Delhi is a municipality within the NCT, administered by the NDMC, which covers mostly Lutyens' Delhi and a few adjacent areas. The municipal area is part of a larger administrative district, the New Delhi district. Although colloquially ''Delhi'' and ''New Delhi'' are used interchangeably to refer to the National Capital Territory of Delhi, both are distinct entities, with both the municipality and the New Delhi district forming a relatively small part of the megacity of Delhi. The National Capital Region is a much larger entity comprising the entire NCT along with adjoining districts in neighbouring states, including Ghaziabad, Noida, Gurgaon and Faridabad. The foundation stone of New Delhi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Indian Institute Of Technology, Roorkee
Indian Institute of Technology Roorkee (abbreviated IIT Roorkee) is a technical university located in Roorkee, Uttarakhand, India. It is the oldest engineering institution in India, and was founded as the College of Civil Engineering in British India in 1847 by the Lieutenant-Governor of the North-Western Provinces, James Thomason, in order to train officers and surveyors employed in the construction of the Ganges Canal. In 1854, after the completion of the canal and Thomason's death, it was renamed the Thomason College of Civil Engineering by Proby Cautley, the designer and projector of the canal. It was renamed University of Roorkee in 1949, and again renamed IIT Roorkee in 2001. The institution has 22 academic departments covering Engineering, Applied Sciences, Humanities & Social Sciences and Management programs with an emphasis on scientific and technological education and research. History The institution was founded in 1847 by James Thomason, the Lieutenant-Gov ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nanotube
A nanotube is a nanometer-scale hollow tube-like structure. Kinds of nanotubes * BCN nanotube, composed of comparable amounts of boron, carbon, and nitrogen atoms * Boron nitride nanotube, a polymorph of boron nitride * Carbon nanotube, includes general nanotube terminology and diagrams * DNA nanotube, a two-dimensional lattice which curves back upon itself, somewhat similar in size and shape to a carbon nanotube * Gallium nitride nanotube, a nanotube of gallium nitride * Silicon nanotube, made of silicon atoms * Non-carbon nanotube, especially tungsten(IV) sulfide nanotubes * Tunneling nanotube A tunneling nanotube (TNT) or membrane nanotube is a term that has been applied to protrusions that extend from the plasma membrane which enable different animal cells to touch over long distances, sometimes over 100 μm between T cells. Two ty ..., a tubular membrane connection between cells * Titanium nanotubes, created by the conversion of the mineral anatase by hydrothermal syn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quantum Dot
Quantum dots (QDs) are semiconductor particles a few nanometres in size, having optical and electronic properties that differ from those of larger particles as a result of quantum mechanics. They are a central topic in nanotechnology. When the quantum dots are illuminated by UV light, an electron in the quantum dot can be excited to a state of higher energy. In the case of a semiconducting quantum dot, this process corresponds to the transition of an electron from the valence band to the conductance band. The excited electron can drop back into the valence band releasing its energy as light. This light emission (photoluminescence) is illustrated in the figure on the right. The color of that light depends on the energy difference between the conductance band and the valence band, or the transition between discrete energy states when band structure is no longer a good definition in QDs. In the language of materials science, nanoscale semiconductor materials tightly confine ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nanotechnology
Nanotechnology, also shortened to nanotech, is the use of matter on an atomic, molecular, and supramolecular scale for industrial purposes. The earliest, widespread description of nanotechnology referred to the particular technological goal of precisely manipulating atoms and molecules for fabrication of macroscale products, also now referred to as molecular nanotechnology. A more generalized description of nanotechnology was subsequently established by the National Nanotechnology Initiative, which defined nanotechnology as the manipulation of matter with at least one dimension sized from 1 to 100 nanometers (nm). This definition reflects the fact that quantum mechanical effects are important at this quantum-realm scale, and so the definition shifted from a particular technological goal to a research category inclusive of all types of research and technologies that deal with the special properties of matter which occur below the given size threshold. It is therefore commo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
High Temperature Superconductor
High-temperature superconductors (abbreviated high-c or HTS) are defined as materials that behave as superconductors at temperatures above , the boiling point of liquid nitrogen. The adjective "high temperature" is only in respect to previously known superconductors, which function at even colder temperatures close to absolute zero. In absolute terms, these "high temperatures" are still far below ambient, and therefore require cooling. The first high-temperature superconductor was discovered in 1986, by IBM researchers Bednorz and Müller, who were awarded the Nobel Prize in Physics in 1987 "for their important break-through in the discovery of superconductivity in ceramic materials". Most high-c materials are type-II superconductors. The major advantage of high-temperature superconductors is that they can be cooled by using liquid nitrogen, as opposed to the previously known superconductors which require expensive and hard-to-handle coolants, primarily liquid helium. A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
